Bump symfony/yaml from 6.4.x-dev to 7.1.0-RC1

Bumps [symfony/yaml](https://github.com/symfony/yaml) from 6.4.x-dev to 7.1.0-RC1.
- [Release notes](https://github.com/symfony/yaml/releases)
- [Changelog](https://github.com/symfony/yaml/blob/7.0/CHANGELOG.md)
- [Commits](https://github.com/symfony/yaml/commits/v7.1.0-RC1)

---
updated-dependencies:
- dependency-name: symfony/yaml
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -72,7 +72,7 @@
         "symfony/event-dispatcher-contracts": "^3.3.0",
         "symfony/options-resolver": "^6.3.0",
         "symfony/var-exporter": "^6.3.0",
-        "symfony/yaml": "^6.3.0",
+        "symfony/yaml": "^6.3.0 || ^7.0.0",
         "theseer/tokenizer": "^1.2.1"
     },
     "require-dev": {